21 Sep
2003
21 Sep
'03
11:17 a.m.
On Sun, 21 Sep 2003, Daniel Roesen wrote:
On Sun, Sep 21, 2003 at 10:08:27AM +0000, Stephen J. Wilcox wrote:
What if you change the behaviour of the GTLD named daemons to return an NXDOMAIN response to any MX queries on non-existent domains, you will then take this whole debate on SMTP out of the equation ...
MTAs fall back to the A RR if there are no MX RRs for a given recipient domain.
That was my understanding but on checking with Paul he said that NXDOMAIN means dont do further checks so dont look for A... Steve